Work holder



R. M. WOYTYCH WORKHOLDER Original Filed Feb. 4. 1925 Patented Dec. 18, 19.28.

EAvEIonn 'n'. uio'YTYongoE Eonn mi LAC, Wisconsin, Aesienon,y Bit AiviE.ienEJAisstieni.l

MENTs',`To-'THE REALE MACHINE "COMPANY, 0E WORCESTER, MASSACHUSETTS, A

CBRPRATI OF MASSACHUSETTS;

wenn Hennen.'

The invention relates to improvements in Worlholders for machine tools, particularly portable holders or shuttles in Whiohtlie Workr blanks are adapted to be centered and clampedi, and-Whichare adapte-id Vto be simi- .larlysupported `in themaehine chuck.

The primary object of the invention is vto providea novel method as hnttle for.hold'-n ing oneJ or' more spiders onother similarly shaped Work blanks in a machine chunk'.

A detailed.k object is. to` provide a 4shuttle vet I Without the spiders taken 'along line 3-3 of fla-nge V11 a Fig; 4L is a detailed sectional vien7 alongline /l-lof Figa- 2.

While the invention is susceptible vataken tions, "I have shownin thvedrayvingsand ivill herein desc be i1i 'cleta il' thefpreferredfenr bodimen't butitisto be that l do not thereby intendtowlimit the invention to the particular forindieclosed,ibut annin 'the appended claims to coverfall modifications and alternativeconstructions falling; Within the spirit andlscope olz the invention.

in the Yexemplary embodiment, the vinvention contemplates the provision of a chuck of suitableconstruction such theoneshivn 1n Figure 1v inwhich the shuttle is adapted tobe mounted, The chuek'comprisxes a body 5 which is secured to la clisli 6 ontli'ef 'foii'\vard end of arotatable `spindle' 7, ancl,$vliicl1 is formedjvith apair ofdiaiiietrically oppoeed and' forwardly extending arms. vvA Vfront platef 9 isjseouredto the armsw and iepijo# vided Withja busi nml() havinga centering` of rotation.

einen riousinoditicationsand alternativelcon ruetion in the'body lwhil'e the shuttle is'bein'g bv coiled spi n bolfeSfQl to limit tli nd bein-@concentric aboutfthe axis nmounted in the body for"reciproeatory movement toward Afrom the bu'shing 10 are a plurality of clan'lpin'gmembers 12 spaced about' tlieiloenterjV the chuck. These members are pressed' `foi-Wardly re eiliently by a plurality ot coiled springs 13,

and are adapted tobe rctractcdby means of a draw rod 'let extendingthrough a spindle 7.'

The shuttle clamped in the chuckV Compri es a(15 whichpreferably is .oylindriin `torni and which is provided with a oentral bore 16 adapted to receive tivo spiders,

one each end-. Each spider isforn'ed with a hub A having a bore a to beground, and

with a plurality` oi` ai'ni's B extending out- Wardly from the hub. In the present instance, four arms B1' erprovided and I"t-lise areadaptedto enga@ in a. like' nun'iber of 1'a`clif al" notehes 17 formed ing the opposite en clsfoffthe body 15.Y On'e end oi the body `is provided,Withafpilotfringl1S adapted to lit into 'tbeliushingO to center,theshuttlein of thearms B. The arms B are held in posiplaced into` the or removed therefrom by' nieanscof a plurality of pliinger's 20 mounted in opposite sides of certain of the notches 17 vand adapted tolengage opposite sides ot saidarnis inst beyondtheir center. Aem-any if the notches. 17 are` provided:with these plungere as may befdesiredQ ln Kthe preeent instance, two eppsedznotches in 'each end of the body 15 are So'equipped;

The plungfers2d of each pain are mounted inbor'esf opeiiinginto opposite side of the associated notch, andere pressed,ini'vardly @SH2-Z disposedbetweenheads 237011 theplunge'rs and nuts" threaded into the outer ends thbores.' *The heads 9 JO are adapted to engage Shoulders 25'in the f ,E... ,rv... l

movement oi the plungers 20'."

The outer sides of the arms B of reach I at its oot todefinitelydetermine'the position spider-project beyond thefends'i'of the body 15, 'and those otnthe`l foremostspider are ".Jdfetli. weeg@ the, Hengel 11 fof ng '10,' thereby sqnaiin'g up both jing,

spiders With respect to the axis of rotation. The clamping members 12 directly engage the hub A of the rear spider to hold the shuttle and spiders in position in the chuck.

From the foregoing it Will'be evident that the method comprises mounting a pair of spiders in a shuttle, one in each end with the arms of the spiders extending through but projecting laterally from notches in said ends to center and square up the spiders in the shuttle, and centrally mounting the shuttle in an end clamping chuck with one vspider engaging the clamping surface of the chuck to square up the spiders in the chuck and with the, other spidei being engaged by the clamping means of the chuck to hold the shuttle and spiders rigidly in position.

The shuttle is extremely simple in construction, and permits one or more spiders or other similarly shaped work blanks to be quickly and accurately mounted in a chuck. Complicated clamping means in the shuttle are unnecessary since the shuttle serves primarily to position the blanks in the chuck and the chuck does the clamping.

I claim as my invention:

1. A shuttle for holding spiders comprising, in combination, a body having a central bore adapted to receive the hubs of a pair oi' spiders one in each end, and having a plurality oi notches in its opposite ends adapted to receive the arms of said spiders, said' notches serving to center and square up said spiders, and means for holding said spiders in position.

2. A shuttle for holding Work blanks having a central portion and a plurality ofextensions, comprising, in combination, a body adapted to receive the central portions of said Work blanks one in each end, and having a plurality oit notches in its opposite ends adapted to receive said projections, and means for holding said Work blanks in position. l

3. A shuttle for holding spiders comprisin combination with an end clamping chuck, a body having a central bore adapted to receive the hubs ot two spiders one in each end and having a plurality otnotches in its opposite ends adapted to partly receive the arms of said spiders to center and square up the samein the shuttle, the arms of one spider being adapted to engage the clamping face ot the chuck to square up the two spiders in the chuck and the other spider being adapted to be engaged by the clamping means of the chuck.

ll. A shuttle ior holding irregular Work blanks comprising a body constructed to receive two Work blanks one in each end and having a plurality of notches in its opposite ends adapted to receive projections on said Work blanks, said `notches being of such depth that the Work blanks project slightly beyond the ends of said body to adapt them to be engaged by the clamping parts'oi a chuck to square up and clamp the and Work blanks theiein.`

5. A shuttle tor holding irregular Work blanks comprising, in combination, avbody that the blanks project slightly beyond thev ends of said body to adapt them to be engaged by the opposed end clamping means ot a chuck to square up and cla-mp the shuttle and blanks in the chuck, and means 'for yieldingly retaining said blanks in said body.

sh uttlc i 6. A shuttle for spiders comprising, in

combination, a body having a central boie adapted 'to receive vthe hub of av spider, and having a plurality of V-shaped notches adapted to receive the arms of said spider Y to center and square up the same, said notches being of such aV depth that the` outer sides et the arms of said spider proj ect.

laterally therefrom to adapt them Vto engage the clamping face in a chuck, and spring pressed means mounted -in certain of said notches for vholding said arms therein.'

7. A shuttle for holding spiders comprising, a body adapted to receive the Yhub of a spider and having a plurality of notches adapted to receive the arms of said spider, said notches being' o'l' such a depth that said arms project laterally therefrom beyond the end of said body, and serving tocenter and square up the spider in said body j 8. he method of holding spiders comprising mounting a pair of spiders one in each s end oi a shuttle with the arms of said spiders positioned in but projecting laterally from notches in opposite ends of said shuttle, and clamping said shuttle in a chuck` With one of said spiders engaging the clamping face of said chuck to square up said shuttle and spiders invsaid chuck, andthe other spider being engaged by the clamping means of said chuck to hold the parts rigidly in position.

9. The method of chucking spiders coinprising inonntingthe hubs of said spiders in opposite ends of a shuttle with the arms of said spider fitting into but'projecting laterally from notches in the ends oi' said body to square up the spiders lin said shuttle, and mounting said shuttle in an end clamping chuck With one spiderl engaging the clamping face of said chuck to square up said shuttle and spiders in said chuck and with the other spider being engaged by the clamping means of said chuck to hold said shuttle and spiders in centered position.

10. The method of chucking irregular Work pieces having a central portion and one or more lateral projections, comprising mounting the workpiece in one end ofa shuttle With the projection or projections of the shuttle, and clamping said shuttle in a chuck with the outer side or sides of said projec`A tion or projectionsv engaging one of vthe clamping surfaces of the chuck to hold the shuttle and the Work piece'in centered rela'- tion in the chuck. i v Y 11. A 'portable' shuttle adapted to be clamped in a chuck, said shuttlefcomprising a body having a plurality of spaced notches in one end adapted to receive the Iprojections of a Work blank,y vsaid notches serving to square upv sa'dvblank in said body and being y of such depth that the sides of said projections project laterally therefrom for engage'- lment by aclamping element of said chuck.

12A shuttle for* yholding Work blanks having outwardly extending projections, said shuttle comprising,in combination, a body having a plurality of notches in one end `adapted* to preceive saidprojections', -and o meansjin said body for engagingcertain of said projections to clamp the latter in said- 'notchea In testimony whereof., I have hereunto affixed vmy signature.

RAYMOND M. VVOYTYCII. f 

